[1] Hans Hallsadius, Leif Uneus, Svante Wallin. Measurement of atmospheric gases [J]. SPIE 1991, 1433
[2] Xue Yanqum, Liu Jianguo, Liu Wenqing et al. Daytime monitoring of urban NO2 columndensity by solar spectro scopic method [J]. Jpn. J. Appl. Phys., 2000, 39: 622~627. part1, No.2A, February 2000
[5] DOAS 2000 Differential Optical Absorption Spectrometer Instruction Manual [M].Thermo Environmental Instru ments Inc. U.S.A, 5~6